Guys,
I was wondering if you know of any application/software that will do
the following:

Once a person holding his pocketPc/cell phone leaves the computer room,
the bluetooth application will make the windows go to sleep, and once
the person come back with the pocketpc/cell the computer will turn back
on and run an application or such.

few years ago, I read that this software exists and I am pretty sure it
is not hard to develop. It is all about range detection.

But anyway, if you know of any such application, let me know.

Thank you.